ORDER CARNASSIER. 337 



instance whence we may learn how much the efforts of 

 mankind operate on the domesticated genera of the animal 

 kingdom. 



The internal changes which determine the external cha- 

 racters of this Dog, consist in a great development of the 

 frontal sinuses, a development which elevates the bones of 

 the forehead above the nose, and which leads in the same 

 direction the cerebral cavity. 



But the most important change, and that, perhaps, which 

 causes all the others, although we cannot perceive the con- 

 nexion, is the diminution of the brain. The cerebral capa- 

 city of the Bull-Dog is sensibly smaller than in any other 

 race, and it is, doubtless, to the decrease of the encephalon 

 that we must attribute its inferiority to all others in every 

 thing relating to intelligence. The Bull-Dog is scarcely 

 capable of any education, and is fitted for nothing but 

 combat and ferocity. 



A fifth toe is occasionally found more or less developed 

 on the hind feet of this race. 



This, like all other races far removed from the primitive 

 type, is difficult of reproduction ; the males are seldom 

 amorous, and the females frequently miscarry. Their life, 

 also, is short, though their development is slow: they 

 scarcely acquire maturity under eighteen months, and at 

 five or six years show signs of decrepitude. 



There is said to be a variety of the Bull-Dog found in 

 Thibet, which is of a black colour. 



The Pug-Dog may almost be called a diminutive variety 

 of the Bull-Dog, to which it is nearly assimilated in ap- 

 pearance, though its tail is more curled. But this animal 

 differs altogether in disposition from the Bull Dog, being 

 as timid as the other is courageous. 



The Mastiff, (Canis Anglicus. L.) This powerful breed 

 is considered as English ; it is said, however, to be bred 

 between the Irish Wolf-Dog and the Bull-Dog. The ground- 

 Vot t II. Z 



